Type-writing machine.



J. A. RONGHETTI.

TYPE WRITING MACHINE.

APPLICATION I'ILBD APR.19, 1909.

Patented Dec. 30, 1913;

4 SEEBTSSHEBT 1. I

J. A. RONGHETTI. TYPE WRITING MACHINE.

APPLICATION FILED APR. 19, 1909. 1,0825 56. Patented Dec. 30, 1913.

I 4 SHEETS-SHEET 2.

J. A. RONGHETTI. TYPE WRITING- MACHINE.

APPLICATION FILED APR.19, 1909.

Patented Dec. 30, 1913.

4 sHBETHiHEET 3.

IN VEN TUI? J.'A. RONGHETTI.

TYPE WRITING MACHINE.

APPLICATION FILED APR. 19, 1909.

Patented B61130, 1913.

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Q INVE/VTUB d.

UNITED STATES?'PATENTOFFIOE.

JOSEPH ALBERT RONC HETTI, OF WOONSOCKET, RHODE ISLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE N OISELESS TYPE-WRITER QOMPAN Y, OF MIDDLETOWN, CON- NECTICUT, A CORPORATION OF CONNECTICUT.

To all whom 'it may concern:

' Be it known that I, J ossrn A. RONCHETTI, a subject of the King of Italy, residing at Woonsocket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Type-Writing Machines, of which'the following is'a full, clear, and exact description, such as will enable others skilled in the art to which it-appertains to make and use the same. I

This invention relates broadly to typewriting machines and more particularly to the escapement mechanism of a machine of a type designed to effect printing without producing noise.

In ty ewi'iting machines as hitherto constructe' a large, part of the noise incident to the operation thereof has been produced by the clicking of the parts of the escapement mechanism. and one of the objects of my invention is to overcome this objection and render the operation of the escapement mechanism substantially noiseless. Other objects will be in partobvious and part pointed out. hereinafter. The invention accordingly consists in the features of construction, combinations of elements and arrangementof parts which will be exemplified in the construction hereinaft er set forth, and the scope of the ap-' plication of which will be indicated in the following claims. 7 i

' In the accompanying drawings, wherein are illustrated several of various possible embodiments of the invention, Figure 1 represents a. plan view thereof, showing the escapement wheel resting upon the fixed dog; Fig. 2 is a side view of the escapement mechanism with the parts similarly positioned; Fig. 3 is a section on line 3-3 of Fig. 1, looking in the direction of the arrow; Fig.

4 is an end view of Fig. 2 of the rocker member, and the parts carried thereon, the escapement wheel being omitted; Figs. 5 and 6 are views similar to Figs. 1 and 2 respectively, showing the position of the parts when the rocker member has been swung to carry the movable feed dog into engagement with the escapement wheel; Fig. 7 is a sectional view on lines 7-7 of Fig. 5, looking in the direct-ion of the arrow; Figs. 8 and'9 are'plan and side views respectively of the parts shown in Fig. 1, the movable dog he I Specificationbf Letters Patent.

view of this modification of the escapement dog; Fig.

Patented Dec. 30, 1913.

Application filed April 19,1908 Serial N 0. 490,918.

ing shown in the back-spacing position; Fig. 10 is a sectional view .8, lookin inthe direction of thearrow; Fig. 11 s ows, in plan, a different embodiment of the escapement, the tooth of the escapement wheel resting against the fixed dog; Fig. 12 is a side view of the mechanism shown. in Fig. 11; Fig. 13 is a plan 7 wherein the esc'apement wheel rests upon the movable dog; Fig. 14 shows another embodiment of my invention, with the escapement wheel resting against the movable 15 is a view in side elevation of the mechanism shown in Fig. .14; and Fig. 16 is a plan view in Fig. 14 with the rocker depressed, whereby av tooth of the escapement wheel rests against the fixed dog.

Referring now to the drawin tioula-rly to the embodiment 0 tion illustrated in Figs.=1 to 10 inclusive, 1 represents a portion of the framing of the machine, which supports, as by means of on line '10-10 of Fig.

0f the escapement show-n" and par-- my mvenlugs 2, pivot screws 3, and upon the latter oscillates the vibratory rocker member 4.

This rocker member carries the fixed or de", taining dog 5, which, as shown, is placed upon the upper side of the rocker and is fixed in position thereon, as by means of clam screws 6. On the same side of rocker memiier 4, there is pivoted at. 7 a lever 8 provided with an inside wiper cam 10. Lever 8 adjacent the cam portion 10, projects downwardly as at 11, in order to greater area, Fig. 4. The cam 10 may be closed, as at 11,'or it may be open at that point if desired. The opposite end of cam lever 8 is connected with a coil. spring 12 attached to the post 13. A leaf spring 14 is fixed to lever 8 at 15 and the end of this spring rests againsta cam roller 16, which secure 1s rotatably mounted on a pivot screw 17in arm 28, which may be connected to the universal bar of the typewrltmg machine orother movable part thereof which 1s actuated through a connection with the key levers or space bar. Having thus descr bed this embodiment of my invention, the operation thereof may now be understood: With he parts in normal position, a tooth of the escapement wheel is resting against the mova'ble dog- 20, holding it in the position shown in Figs. 5 and 7, and'at this point it may be noted that the face of the movable dog 20 is placed slightly in advance of the face of the fixed dog 5, as shown in these figures. .VVhen the rocker member is depressed to the position shown in Figs. 1 to 3, the tooth o the escapement wheel will pass from the movable dog to the fixed dog and the tooth 30 of the movable dog will swing rearwardly, as shown in Fig. 1, being forced to that position by means of spring 12acting upon lever 8, thus bringing cam 10 to the position shown in that figure. Then, when the rocker member 4 is swung upwardly, the tooth 26 is released from the fixed dog, and the tooth 27 of the escapement wheel engages the tooth 30 of the movable dog, forcing that dog to the position shown in Figs. 5, 6 and 7 Where the tooth 27 rests upon the movable dog whose motion is arrested by means of the cam roller 16 engaging the cam surface 10 of the lever 8 and moving that cam to the position shown in Fig. 5 against the resistance of spring 12, In that position, roller 16 rolls against the surface of cam 10 as far as it can until the cam surface stops. it from going any farther, thus effecting-the arresting of the movable dog and the associated parts in a silent. manner. Upon swinging the rocker member downwardly again, as shown in Figs. 2 and 3, the movable dog is again released and flies outwardly as before, being impelled by cam- 10 and spring 12; and it will be noted that the cam, in conjunction with spring 12, arrests the movable dog in an intermediate position, spring 14 at all times holding the roller 16 against the surface of the cam.

When it is desired to effect back spacing,

the escapement wheel 25 may be pushed rearwardly, thus forcing it from the position shown in Fig. 5 to the position shown in Fig. 8. This permits the tooth 30 -to pass over the tooth 26, after which, upon the release of the back-spacing key (not shown), the tooth 26 will rest against the tooth 3O of the dog 20 and the parts will assume the positions shown in Fig. 5. During the backspacing operation, the roller 16 will leave the cam surface 10 and bend spring 14 temporarily, as shown in Fig. 8, and at the same time lever-'8 will be swung in the opposite direction, slightly expanding the spring 12; that is, the pressure of spring l4 will counterbalance the tenion of spring 12 when the parts are in the position shown in Fig. 8. In the embodiment of my inventionshown in Figs. 11 to 13 inclusive, the positions of the parts are reversed. In this construction, 7o

pivoted at 32 and is prothe movable dogis 33 and 34, the

vided with ,cam surfaces curves of which have a larger radius than I that of the cam roller 35 WhlCh engages said cam surfaces. The ba m roller 35 is journaled u )on a stud 36 secured to a bifurcated arm 3' 7 pivoted, as at 38, to the rocker member, said arm'havinmsa retractile spring 40 connected' therewith, which tends to draw the same to the right. In the operation of this device, the rocker has been depressed as shown in Figs. 11 and 12, and'the tooth 26 of the escapement wheel is supported bythe fixed dog 5. Upon swinging the rockerup-L wardly, the tooth 26 will be disengaged from the fixed dog, and the-tooth 27 will he engaged with the'tooth' 30 of'the movable dog, and that dog moved from the position shown in Fig. 11 to that, shown in Fig. 13.. During that movement, the cam surface of the'movable dog engages the roller 35, forcing it from the position shown in Fig. 11 to that shown in Fig. 13, where the motion of the dog will be arrested by the cam surface 34 against the tension of the spring 40.

Inasmuchas the camisurface 34 is of larger radius than that of the roller 35, the arresting of the movement of the dog will be substantially noiseless.

Referring now to theembodiment of the invention illustrated in Figs. 14 to 16 inclusive, the movable dog 20 is provided with a cam slot 41, which engages the roller 42 "on the swinging arm 43,"the movement of the'swinging arm being resisted by means of the tension spring 44, which tends to pull that arm to the position shown in Fig. 16.

In Figs. 14 and,15, the parts are shown in their normal positions of rest, in which the escapement tooth 26 rests against the movable dog 30, such doghavin g been brought to such position of rest. by the swingingmovement of the roller in the cam groove 41 against the tension of spring 44, thus noiselessly arresting the motion of the dog. Upon moving the rocker member 4 downwardly, the fixed dog 5 engages with tooth 26 of the escapement wheel, and the movable dog 30 will jump forward as shown inFigt. 16, being impelled to that position by means of the coiled spring 44, pulling the arm 43 in astraight line with the spring 44, roller 42 engaging with the cam. slot 41 during that operation." It will, accordingly, be seen that I have provided mechanism well adapted toattai-n, among others, all the ends and objects above pointed out in an exceedingly simple yet efficient manner.

The embodiments of the invention herein described for carrying out the invention each comprise comparatively few parts,.and there is, therefore, little likelihood of any part thereof becoming deranged. It will be observed that, inasmuch as no compact or concussion of movable parts takes place in the escapement, no noise can be produced, and yet the parts can be accurately and positively arrested in position to which they are adapted to be moved.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having described my inventiomwhat I claim as new and desire to secure by United States Letters Patent is:

1. In an escapementmeoha'iiism, the combination with a rack member to be spaced, of a movable feed dog pivotajlly supported at one end coiiperating therewith, a cam member pivotally supported intermediate its ends adapted to coact with said dog at one end, and springfmeans coacting with the other end of said cam member adapted to be tensioned to silently arrestv the movement of the dog when engaged bythe rack member.

2. In ,an escapementfm'echanism, in comv bination with a rack member adapted to be spaced, of a movable feed dog coiiperating therewith, and a concave cam member having one end yieldingly connected with a relatively fixed part and ither end adapted to coact witlgisaid mova dog to silently arrest its movement. r In an escapement mechanism, the combination with a rack member to be spaced,

- of a movablymounted feed-dog adapted to 'coac .trewith, a stud carried by said dog, and; ncave cam membercoacting with said -d and yieldingly held in operative relation thereto.

4. In an escapement mechanism, in combination with a rack member to be spaced, of a movable feed' dog coacting therewith, and a pivetally mounted member connected with said dog having an oscillating movement upon its support adapted to be held in an intermediate position when said dog is out of engagement withthe rack member.

5. In an escapement mechanism, the combination with a member to be spaced, of a rocker member, fixed and movable dogs carried on opposite sides of said rocker member, and a movable member connected with the movable dog and on the same side of the rocker member as said fixed dog adapted to arrest the movements of said movable dog. 6. In an escapement mechanism, the combination with a member to be spaced, of a rocker member, fixed and movable dogs carrocker member carrying a fixed and a mov able dog, of means for arresting the movements offthemovable dog, comprising an arm copnected therewith pivoted interme diate its ends and adapted to interpose a yielding resistance to the movements of said movable dog and ultimately to arrest such movements.

8. In an escapement mechanism, the combination with the part to be spaced, and a -35 rocker member carrying a fixed and a pivottally mounted dog, of a pivotally mounted spring-actuated member carried by the rocker member, which is connected with the movable dog and normally holds the same in 'an intermediate position, but which permits the same to be swung to either side of such position.

9. In a flypewritin'g machine, *in combination, a member adapted to be spaced, means for efiecting spacing thereof, comprising a rocker member provided with a fixed dog and a movable dog adapted to be engaged with the spaced member when said rocker member-is actuated, and a pivotally-mounted spring-actuated member carried by the rocker member which is connected with the movable dog and normally holds the same in an intermediate position, but permits the same to be swung to either side of such position and arrests the same when swung without impact or concussion.

10. In an escapement mechanism for typewriting machines, in combination, aspaced. member, a member carrying a fixed and swinging feed dog, means for effecting a relative movement between said elements whereby said dogs are engaged alternately with said spaced member, meansconnected with said swinging dog for holding the same normally in an intermediate position and for arresting the movement thereof when the same is engaged with said spaced member and moved thereby and a spring for controlling said means.

11. In an escapement mechanism for typewriting machines, in combination, a member to be spaced, :1 vibratory dog carrier provided with a fixed detaining dog, a swinging feed dog and a swinging member mounted upon opposite sides of the dbg carrier, which latter cooperates with said movable feed dog to arrest the same when it has been engaged with the spaced member and moved'thereby "dog, said swinging member-being adapted to member to be spaced, a rocker member, a. feed dog pivotally-mounted thereon and capable of-occupying different positions, a

swinging member carried by the rocker member having a cam portion engaged with said feed dog adapted to limit the movement thereof when engaged with the member to be spaced and moved thereby, a spring adapted to hold said movable part in engagement, and means which cotipera'tes with said swinging member for returning said feed dog to a normal position.

13; In escapement mechanism for typewriting machines, the combination of amember to be spaced,'a rocker member, a '6 feed dog pivotally-mounted thereon, adapted normally to rest in an intermediate position, but capable of being swung to either side of such'position, a swinging member cooperating with said feed dog, one of said last named parts being provided with a concave cam portion and the other thereof with a projccting'portion engaging said cam, said swinging member being adapted to arrest the movements of said teed dog when the same is moved to either side of its normal position, and spring means cooperating with said swinging member for arresting the feed dog in its intermediate position.

14. In an escapement for typewriting machines, the combination with the member to be spaced, of spacing means therefor, comprising a vibratory dog-holder, aswinging feed dog, a swinging stop member pivoted intermediate its ends connected with said feed dog and adapted to arrest the movement thereof when the same has been engaged with the member to be spaced and moved thereby, and independent pivots upon said rocker 'member for each of said swinging elements.

15'. In escapement mechanism, the com bination with a part to be spaced, of spacing'means therefor, comprising a vibratory -dog-holder, a swinging feed dog carried thereby, a swinging stop member carried thereby, one of said last mentioned elements being provided with a cam opening and the other with a projection engaging with said cam, and a spring connected with said swinging stop member.

16. In an escapement mechanism for typewriting machines, the combination with the member to be spaced, of spacing means therefor, comprising a vibratory dog-holder,-

a swinging feed dog carried thereby, a

swinging stop arm carried thereby, one of said last mentioned elements being provided v 'with-a cam opening and the other thereof with a cam projection extending through said opening,-a spring=upon'one of said parts for maintainingsaid-projection ,in engageiment with 'the-wal'lsoi the opening in the other part, and a spring connected with said ;st0p armand adapted'to urge the same to such position as will arrest the feed dog in a normal intermediate position;

l7.-In escapement mechanism for type writing machines, the combination with the.

part to be spacedy of spacing means therejfor, comprising a vibratory dog-holder, a-

SWIIIglIIg feed-dog mounted thereon, a

swinging fsto'p arm carried: by the dog- ;holder, said'stop arm being providedwith:

a cam aperture, and a leaf spring mounted iupon said'stop arm and engaging saidprojjection' to hold the same in engagement with the wall .of said cam aperture. I 18. In an escapement'for typewriting mafchi-nes, the combination with the member to be 'spaced, of. a rocker member,'a fixed dog on one side of said member, a pivot- ;ally mounted movable dog secured to the 'opposite side of said member, and means :secured to said rocker member on the same side as said fixed dog for silently arresting the movement of said movable dog. -19. Injescapement mechanism for typewriting machines, in combination, a member to be spaced, spacing means therefor including a rocker member, a fixed dog on one side and a movable dog on the opposite side .of said rocker member, and spring actuated means for controlling the position of said movable dog, said means coacting with said movable dog to positively limit the movement of the movable dog when engaged by the member to be spaced.

20. In escapement mechanism {writing machines in combination, a member to be spaced, spacing means therefor including a rocker member, a fixed dog on one side and a. movable dog on the opposite side of said rocker member, spring actuated means forcontrolling the position of said movable dog, said means coactingwith'said movable dog to positively limit the move ment of the movable dog when engaged by the member to be spaced, and a cap for holding said movable dog inposition.

21; In escapement mechanism for typewriting machines, in combination, a member to be spaced, spacing means therefor inposition of the movable dog when engaged by the member to be spaced.

22. In escapement mechanism for typefor type-- writing machines, in combination, a member to be" spaced, spacing means therefor including a rocker member, a fixed and movable dog on opposite sides of said rocker member, spring actuated means for controlling the position of said movable dog, said means coacti'ng with said movable dog positively to limit the movement of the movable dog when engagedby the member to 'be spaced, and spring means for Holding the movable dog and means in constant engagement. 7

23. In escapement mechanism for typewriting machines, in combination, a rocker member, a fixed dog and av movable dog associated therewith, and a cam member for controlling the position of said movable dog, said cam member and said movable dog being positioned on opposite sides of said rocker member.

24. In escapement mechanism for typewriting machines, in combination, a rocker member, a fixed dog and a movable dog associated therewith, and a pivotally mounted spring actuated cam member for cont-rolling the position of said movable dog, said pivotally mounted spring actuated cam memher being positioned on the opposite side of said rocker member.

In testimony whereof I afiix my signature, 30

in the presence of two Witnesses.

JOSEPH ALBERT RONCHETTI. Witnesses: ARTHUR J. B. HUDSON,

Rev J. SOULER.

Copies of this patent may be obtained for five cents each, by addressing the com-um: of Patents, Washington, D. 0." 

